Darkwood Manor by Jenna Ryan

 Like Darkwood Manor, Donovan Black was an utter mystery. An FBI sharpshooter who couldn't break away from his past, he only wanted to make sure that history didn't repeat itself especially now that the Manor had a lovely new owner.

 Isabella Ross had either discovered the perfect vacation spot or her final resting place. Now her only hope for survival is a man that doesn't want her around a man she can't seem to resist. But something or someone won't rest until the Manor house is empty

 .38 Calibre Cover–Up by Angi Morgan

 Rogue DEA Agent Erren Rhodes doesn't know whether it's a case of good or bad luck that blows his cover and sends him crashing into the arms of a beautiful Dallas cop.

 Darby O'Malley will do whatever it takes to prove her accused brother innocent of murder even if it means forging a partnership with Erren and his controlling methods. Together, they sift through the lies to reveal the truth. But it's the clues they uncover about each other that lead to a smouldering attraction neither can deny.